Most of Italian thermal culture sits in the north — the Dolomites, the Veneto, the Roman baths preserved in the cities the legions built. Tuscany has its own thermal layer, older and less visited. The most preserved property in that layer is Bagni di Pisa, twenty minutes north of Pisa, in the small hill town of San Giuliano Terme.

This is a working thermal spa inside an 18th-century Medici palace, run continuously since 1742. The waters are natural sulfur, surfacing at 38 degrees Celsius from a fault system that has been active in the Tuscan subsurface since the Pleistocene. The building has not been substantively rebuilt. The protocol of the bath — soak, mud, rest — has not changed.

The Medici and the Grand Duke

The property was built as a summer residence by Francesco I de’ Medici in the 16th century. The mineral springs at the site had been known since the Roman period, but the formal bath culture around them was institutionalized by the Medici. By the 18th century, when the Medici line ended and the Grand Duchy of Tuscany passed to the Habsburg-Lorraine family, the property became one of the principal summer residences of the new dynasty.

Grand Duke Leopold II of Tuscany — who ruled from 1824 to 1859 — used Bagni di Pisa as both a residence and a treatment property. The historical records describe him taking the waters on a regular schedule for digestive and circulatory conditions. The protocol he followed — two soaks daily at 38 degrees, mud applications to the lower limbs, rest in the loggia — was documented by his court physicians and is the same protocol the property runs today.

Percy Bysshe Shelley visited the baths in 1820, during his last years in Italy. His Italian diaries describe the property and the sulfur springs in detail. He took the waters at the property on several occasions, and the spa’s archive holds the receipts of his stays. Other historical guests recorded in the property’s books include Carlo Goldoni, Vittorio Alfieri, and the Italian nobility of the late 18th and 19th centuries.

This is the layer the property operates inside. The Italian thermal tradition is older than the Roman one and continuous in a way that the more famous European thermal towns — Baden-Baden, Marienbad, Vichy — are not. Bagni di Pisa has been running on the same waters in the same building under the same protocol for almost three centuries.

The waters and the protocol

The sulfur springs at the property surface at 38 degrees Celsius from two principal sources. The water is high in calcium sulfate, bicarbonate, and trace minerals. The dissolved hydrogen sulfide gives the characteristic mineral smell that any visitor to a working thermal spa recognizes; the concentration is medical-grade rather than recreational.

The therapeutic indications are the indications Italian thermal medicine has identified across two centuries of clinical observation — respiratory inflammation, joint and soft-tissue conditions, dermatological conditions, digestive irregularity. The contraindications are also well-documented: acute cardiovascular conditions, recent surgery, severe hypertension. The property runs a medical consultation for any treatment beyond the standard soak; a qualified physician is on staff.

The standard soak protocol is two sessions per day, each of 20 minutes in the 38-degree pool, separated by at least three hours. The body absorbs the minerals through the skin and through the respiratory mucosa over that period. The post-soak protocol is rest — 30 to 45 minutes in the loggia, hydration with the property’s still water, no immediate physical exertion.

For an athlete reading this protocol — the read should be familiar. The thermal soak operates on the body the way an active recovery session does. The increased peripheral circulation, the reduction in muscle tone, the parasympathetic shift — these are the mechanisms a working physiology recovery program already runs on. The thermal spa is the 1700s version of a contrast bath protocol, and the underlying physiology is the same.

The grotto

The signature feature of the property is the grotto — a natural cave at the rear of the building, set directly over the principal spring. The grotto is small, about four meters by six, with a vaulted limestone ceiling and a stone bench running along three walls. The temperature inside the cave runs around 36 degrees with high humidity — the natural steam from the spring.

The grotto session runs 15 minutes. The body sweats heavily inside; the recovery protocol is a 20-minute cool-down in the loggia. The grotto is the closest thing in modern Italian thermal culture to a Roman caldarium operated on its original source.

For most members, the grotto session is the single most important part of the property’s protocol. Shelley described it in his diaries. The Grand Duke used it daily during his stays. The historical continuity is on the body.

The mud applications

Bagni di Pisa runs a mud (fanghi) program drawn from the property’s own mineral mud deposits. The mud is matured in tanks of the thermal water for at least six months before use — the maturation process is what differentiates Italian medical fanghi from cosmetic mud applications elsewhere. The mineral concentration in matured fanghi is significantly higher than in the source water, and the application is targeted to joint and soft-tissue work.

A standard fanghi application runs 20 to 25 minutes, at body temperature, on the targeted area (the knees, the lumbar spine, the shoulders, depending on indication). The application is followed by a soak in the thermal pool and a 30-minute rest in a heated room (the “reazione” — the reaction phase, where the body’s response to the mineral application is allowed to complete).

For members coming in with sport-related joint or soft-tissue conditions — old surgical sites, chronic tendinopathy, post-season recovery — the fanghi program is the part of the protocol that delivers the most documented therapeutic effect. Two-day and three-day programs are routed for this purpose.

The massage and the loggia

The property’s massage program runs in the historic loggia — a colonnaded gallery on the second floor of the palace, with views across the gardens to the Pisan hills. The massage technique is Italian thermal massage — slower than Thai work, less deep than sports massage, designed to integrate with the thermal protocol rather than substitute for it. The river-stone massage is the signature: heated basalt stones placed at the standard thermal massage points along the spine and the major muscle groups, with hands working in between.

A river-stone massage at Bagni runs 50 minutes. The cost is modest by Italian luxury-spa standards. The therapists are trained in the property’s own protocol, which has been in continuous transmission inside the building for generations.

The rooms and the stay

The palace holds 62 rooms across the main building and the historic wing. The rooms are restored to the 18th-century Medici-Lorraine palette — fresco ceilings, terracotta floors, restrained furniture in the period style. The room category we recommend is the Junior Suite in the historic wing, which puts you closer to the loggia and the gardens than the standard rooms in the modern annex.

The two-night stay is the right length for a member coming for the protocol. Day one: arrival, medical consultation, evening soak. Day two: morning grotto, afternoon fanghi, evening river-stone massage. Day three: morning soak, departure after lunch. The body settles into the protocol on the second day; one-night stays are not enough time for the work the property is designed to do.

The food at the property is taken seriously. The restaurant — Dei Lorena — runs a Tuscan kitchen with the regional produce and the property’s own olive oil. The wine list is regional. For a member following a thermal protocol, the standard dietary read at the property is lighter than a typical hotel kitchen offers — protein, vegetables, the olive oil, the local bread, the wine in moderation. The kitchen accommodates this without negotiation.

How to route it

• As an extension of a Pisa or Florence trip. Two nights at the property after a Florence cultural week or a Pisa hidden-Tuscany loop. The body absorbs the program after the city days.
• As a standalone wellness trip. Three nights in spring or fall, paired with light cycling in the San Rossore park (covered in our hidden-Pisa piece) and a longer protocol of fanghi and grotto sessions.
• As a recovery layer in a longer European trip. Two nights between heavier chapters — the city days in Rome, the food days in Florence, the architecture days in Venice. The property functions as a recovery node.

For members familiar with the high-end Alpine thermal culture — Vals in Switzerland, Bad Ragaz, the Aman Le Mélézin in Courchevel — Bagni di Pisa runs a different register. The Alpine properties are dressed contemporary; Bagni is dressed historical. The Alpine waters are silicate and lithium; Bagni’s are sulfur and bicarbonate. The protocols overlap on the body and diverge on the cultural surface.

For a member who wants the older European thermal tradition in its preserved form, this is the property we route. The Grand Duke’s protocol, the Shelley diaries, the Medici building, the continuous operation since 1742 — the room is the room.

Reach us at hello@thebespoketraveler.co to route Bagni di Pisa inside a Tuscan or broader Italian trip.